EP1439737A2 - Implantierbarer elektromechanischer Wandler - Google Patents
Implantierbarer elektromechanischer Wandler Download PDFInfo
- Publication number
- EP1439737A2 EP1439737A2 EP04450006A EP04450006A EP1439737A2 EP 1439737 A2 EP1439737 A2 EP 1439737A2 EP 04450006 A EP04450006 A EP 04450006A EP 04450006 A EP04450006 A EP 04450006A EP 1439737 A2 EP1439737 A2 EP 1439737A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- transducer according
- transducer
- thin shell
- hollow body
- piezoelectric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000002435 tendon Anatomy 0.000 claims abstract description 4
- 210000000959 ear middle Anatomy 0.000 claims description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- 210000000988 bone and bone Anatomy 0.000 claims description 7
- 239000007943 implant Substances 0.000 claims description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 210000001188 articular cartilage Anatomy 0.000 claims description 5
- 239000000560 biocompatible material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 2
- 238000005530 etching Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 claims description 2
- ZBSCCQXBYNSKPV-UHFFFAOYSA-N oxolead;oxomagnesium;2,4,5-trioxa-1$l^{5},3$l^{5}-diniobabicyclo[1.1.1]pentane 1,3-dioxide Chemical compound [Mg]=O.[Pb]=O.[Pb]=O.[Pb]=O.O1[Nb]2(=O)O[Nb]1(=O)O2 ZBSCCQXBYNSKPV-UHFFFAOYSA-N 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims 1
- 230000001143 conditioned effect Effects 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 claims 1
- 210000003454 tympanic membrane Anatomy 0.000 abstract description 7
- 210000000845 cartilage Anatomy 0.000 abstract 2
- 239000000463 material Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 239000010839 body fluid Substances 0.000 description 4
- 210000001124 body fluid Anatomy 0.000 description 4
- 210000003027 ear inner Anatomy 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 206010051728 Bone erosion Diseases 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 210000000883 ear external Anatomy 0.000 description 2
- 239000010437 gem Substances 0.000 description 2
- 229910001751 gemstone Inorganic materials 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- ZMRUPTIKESYGQW-UHFFFAOYSA-N propranolol hydrochloride Chemical compound [H+].[Cl-].C1=CC=C2C(OCC(O)CNC(C)C)=CC=CC2=C1 ZMRUPTIKESYGQW-UHFFFAOYSA-N 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 210000001088 stapedius Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/18—Internal ear or nose parts, e.g. ear-drums
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/36036—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation of the outer, middle or inner ear
- A61N1/36038—Cochlear stimulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
- H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
- H04R25/606—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/18—Internal ear or nose parts, e.g. ear-drums
- A61F2002/183—Ear parts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/67—Implantable hearing aids or parts thereof not covered by H04R25/606
Definitions
- the invention relates to an implantable electromechanical transducer for cochlear implants and implantable hearing aids according to the preamble of claim 1.
- Fully or partially implantable hearing aids such as cochlear implants or implantable hearing aids require an implantable transducer to accommodate the am Sound of the patient's incoming sound, which is converted into electrical signals for the further Processing in the corresponding hearing aid must be converted.
- a first approach represents the direct conversion of the airborne sound arriving at the ear into electrical signals, which can be realized by various means, which are known from US 3 882 285, US 4 988 333, WO 96/21333, US 5 411 467, EP 0 831 673.
- Disadvantages of this approach are that the natural directional filtering of the outer ear is usually not used and / or that the fixation / implantation of the required transducer components leads to adverse reactions of the affected / surrounding tissue.
- EP 0 263 254 describes an implantable transducer made of piezo film, piezo crystal or a piezoelectric accelerometer known in which one end in the Bone is cemented and the other end with a vibrating component of the Middle ear is rigidly connected.
- rigid connections to the ossicles pose the risk of bone erosion and that a Cementing of converter components in the middle ear area to mechanical and encounters toxicological reservations.
- WO 94/17645 describes an implantable transducer based on the capacitive or of the piezoresistive principle known, which by means of micromechanical technologies to be manufactured. This transducer is intended as a pressure receiver in the anvil-stirrup joint work. Because the stirrup with the coupled inner ear is a resonance system forms, however, it is feared that insufficient sensitivity throughout Usable frequency range can be achieved. This fear also applies to those on implantable transducer based on hydroacoustic signal transmission according to WO 97/18689 and DE 100 30 372.
- the task of deriving an implantable microphone can be derived from the prior art To convert the sound arriving at the ear into electrical signals in such a way that Adequate sensitivity in the entire useful frequency range ensures that as little additional energy is needed that the sensitive bone and Tissue structures of the ear through a suitable positioning and coupling of the implantable microphones are used as little as possible and that the Long-term stability and biocompatibility of the implantable microphone through a hermetic tight, compatible wrapping is guaranteed.
- the hollow body has a thin shell that on its Connected on the inside with the piezoelectric transducer elements and on its outside an ossicle can be coupled and which is held by a stable edge, whereby the stable edge can be coupled to a counter bearing in the middle ear space.
- the conversion of mechanical vibrations into an electrical one Voltage realized by one or more piezoelectric transducer elements which for Isolation against body fluid from a hermetically sealed hollow body biocompatible material, preferably made of titanium or a titanium alloy are.
- the hollow body is designed so that it has a thin shell that through a stable edge is held, which can be coupled to a counter bearing in the middle ear space is.
- the piezoelectric transducer elements are on the inside of the hollow body with the thin shell connected to the outside of the thin shell
- the ossicles are coupled so that the vibrations of the ossicles are too Deformations of the piezoelectric transducer elements and thus an electrical one Apply voltage to the electrodes of the converter elements.
- the electrical voltage is through hermetically sealed, electrically insulating bushings (e.g. made of glass, precious or semi-precious stone) to suitable connections outside the Guided hollow body and is there for further processing in a cochlear implant or a hearing aid.
- electrically insulating bushings e.g. made of glass, precious or semi-precious stone
- An advantageous embodiment of the transducer is achieved, for example, by shaping the hollow body as an elliptical box, a piezoelectric transducer element in the form of a thin bending plate being connected to the thin shell shaped as a thin elliptical plate. In this case it is possible to reduce the height of the can to less than 1 mm.
- connection between the stable edge and the thin shell can be achieved on the one hand various connection methods, e.g. Welding.
- connection methods e.g. Welding.
- stable edge and thin shell from a whole through mechanical separation and Forming processes or by chemical processes such as To produce etching.
- the connection between piezoelectric transducer elements and the thin shell can be made through Glue or by mechanical means.
- the piezoelectric transducer elements themselves can consist of all known piezoelectric materials. However, it is cheap the use of specially grown single crystals of lead magnesium niobate lead titanate (PMN-PT) or lead zinc niobate lead titanate (PZN-PT) because of their electromechanical Properties the size of the piezoelectric transducer elements and thus that of the whole Converter can be minimized.
- An execution consists of a stand made of biocompatible in the niche of the oval window Material, preferably made of titanium or a titanium alloy, which accommodate the hollow body can.
- An alternative way is to use one with a bone of the Middle ear screwed support element. In both cases you can use Do not use glue, which eliminates the risk of toxic damage.
- FIG. 1 shows an overview of the relevant structures of the middle ear space. Sound waves reach the eardrum 1 and set it in vibrations, which are passed through the ossicles hammer 2 , anvil 3 and stirrups 4 to the oval window 6 of the inner ear. The anvil-stirrup joint 5 is also shown .
- the hollow body 8 consists of a flat elliptical can, with one side with the articular cartilage 7 of the severed anvil 5 and on the other side with a placed in the recess of the oval window 6 and in the bony canal Stapedius tendon fixed stand 21 is connected.
- the vibrations of the eardrum 1 are transmitted from the hammer 2 , anvil 3 and articular cartilage 7 to the thin shell of the hollow body 8 .
- Contact with the articular cartilage minimizes the risk of damage to the anvil 3's bone tissue.
- the hollow body 8 consists of an elliptical plate-shaped thin shell and a stable rim formed into an elliptical hollow cylinder with a bottom.
- the stable edge of the hollow body 8 is connected to the stand via placeable plates 23 , the latter having a spur 22 as a means for anchoring in the bony duct of the stapedio tendon.
- 3 shows an embodiment of the hollow body and the structures accommodated by it.
- the hollow body consists of an elliptical plate-shaped thin shell 9 and a stable rim 10 formed from a titanium or a titanium alloy into an elliptical hollow cylinder with a base.
- a plate-shaped piezoelectric transducer element 11 is glued to the thin shell 9 in an electrically conductive manner.
- the electrical voltage with respect to the titanium hollow body is passed through a bonded connecting wire 13 to an electrical connection 16 which is connected to the stable edge 10 via a hermetically sealed, electrically insulating bushing 15 .
- the maximum deflection can be limited by a deflection limiter 14 .
- thin shell 9 and stable edge 10 again consist of titanium or a titanium alloy.
- the piezoelectric transducer element 11 is now held by support frames 18 . Contacting the piezoelectric transducer element can be implemented in a simple manner by means of a metal layer 17 on one or both support frames.
- the metal layer 17 is connected to the electrical connection 16 , the latter being connected to the stable edge 10 again via a hermetically sealed, electrically insulating bushing 15 .
- FIG. 5 shows a further embodiment of the hollow body and the structures accommodated by it.
- Thin shell 9 and stable edge 10 are made of titanium or a titanium alloy, to the thin shell 9 a plate-shaped piezoelectric transducer element 11 is glued in an electrically conductive manner.
- the electrical voltage with respect to the titanium hollow body is led through a bonded connecting wire 13 to an electronic circuit 27 which is used to condition the signal voltage. Since the circuit 27 must be supplied with an operating voltage, two electrical connections 16 are provided in this case, which are connected to the stable edge 10 via hermetically sealed, electrically insulating bushings 15 .
- FIG. 7 shows an embodiment of the converter in which the counter bearing is formed by a stand which can be supported in the recess of the oval window.
- the stand consists of an upper part 24 and a lower part 25, which are connected to one another via a latchable length adjustment 26 .
- FIG. 8 shows a cross section of the middle ear area with a further embodiment of the implanted transducer according to the invention as a microphone for an implantable hearing aid.
- the hollow body 8 again consists of a flat elliptical box which is coupled to the hammer 2 .
- the counter bearing is realized here by a support element 19 connected to the stable edge of the box, which leads to a screw connection 20 to a bone of the middle ear space.
- the hammer-anvil joint 5 is severed.
- the vibrations of the eardrum 1 are transferred to the hammer 2, anvil 3 and the thin shell of the hollow body 8 .
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Neurosurgery (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pulmonology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Prostheses (AREA)
Abstract
Description
Eine vorteilhafte Ausführung des Wandlers wird beispielsweise erreicht, indem der Hohlkörper als elliptische Dose ausgeformt wird, wobei ein piezoelektrisches Wandlerelement in Form einer dünnen Biegeplatte mit der als dünne elliptische Platte ausgeformten dünnen Schale verbunden ist. In diesem Fall ist es möglich, die Höhe der Dose auf weniger als 1 mm zu reduzieren.
- Fig. 1
- eine Übersicht über die relevanten Strukturen des Mittelohrraums
- Fig. 2
- einen Querschnitt des Mittelohrbereiches mit einer Ausführungsform des implantierten Wandlers
- Fig. 3
- eine Ausführungsform des Wandlers mit Positionierung durch unterlegbare Plättchen
- Fig. 4
- eine Ausfühnmgsform des Hohlkörpers mit geklebten piezoelektrischen Wandlerelementen
- Fig. 5
- eine Ausführungsform des Hohlkörpers mit mechanisch gelagerten piezoelektrischen Wandlerelementen
- Fig. 6
- eine Ausführungsform des Hohlkörpers mit elektronischer Schaltung zur Sinalkonditionierung
- Fig. 7
- eine Ausführungsform des Wandlers mit rastbarer Zweiteilung des Ständers
- Fig. 8
- einen Querschnitt des Mittelohrbereiches mit einer weiteren Ausfübrungsform des implantierten Wandlers.
In der Fig. 6 ist die in Fig. 2 gezeigte Ausführungsform des Wandlers näher erläutert. Der Hohlkörper 8 besteht aus einer elliptischen plattenförmigen dünnen Schale und einem zu einem elliptischen Hohlzylinder mit Boden ausgeformten stabilen Rand. Der stabile Rand des Hohlkörpers 8 ist über unterlegbare Plättchen 23 mit dem Ständer verbunden, wobei letzterer einen Sporn 22 als Mittel zur Verankerung im knöchernen Kanal der Stapediussehne aufweist.
In der Fig. 3 ist eine Ausführungsform des Hohlkörpers sowie der durch ihn beherbergten Strukturen gezeigt. Hierbei besteht der Hohlkörper aus einer elliptischen plattenförmigen dünnen Schale 9 und einem zu einem elliptischen Hohlzylinder mit Boden ausgeformten stabilen Rand 10 aus Titan oder einer Titanlegierung. An die dünne Schale 9 ist ein plattenförmiges piezoelektrisches Wandlerelement 11 elektrisch leitend geklebt. Die elektrische Spannung bezüglich des Titanhohlkörpers wird durch einen gebondeten Anschlußdraht 13 zu einem elektrischen Anschluss 16 geführt, welcher über eine hermetisch dichte, elektrisch isolierende Durchführung 15 mit dem stabilen Rand 10 verbunden ist. Um zu hohe mechanische Belastungen der dünnen Schale 9 zu vermeiden, kann der Maximalausschlag durch einen Auslenkungsbegrenzer 14 begrenzt werden.
In der Fig. 8 ist ein Querschnitt des Mittelohrbereiches mit einer weiteren Ausführungsform des implantierten erfindungsgemäßen Wandlers als Mikrofon für ein implantierbares Hörgerät gezeigt. In dieser Ausführungsform besteht der Hohlkörper 8 wieder aus einer flachen elliptischen Dose, die an den Hammer 2 angekoppelt ist. Das Gegenlager wird hier durch ein mit dem stabilen Rand der Dose verbundenes Stützelement 19 realisiert, welches zu einer Verschraubung 20 mit einem Knochen des Mittelohrraumes führt. Zur Vermeidung einer Rückkopplung der Schwingungen der mit dem Steigbügel 4 in Verbindung stehenden Innenohrflüssigkeit auf den implantierten Wandler wird das Hammer-Amboß-Gelenk 5 durchtrennt. Die Schwingungen des Trommelfells 1 werden auf Hammer 2, Amboß 3 und die dünne Schale des Hohlkörpers 8 übertragen.
- 1 -
- Trommelfell
- 2 -
- Hammer
- 3 -
- Amboß
- 4 -
- Steigbügel
- 5 -
- Amboß-Steigbügel-Gelenk
- 6 -
- ovales Fenster
- 7 -
- Gelenkknorpel
- 8 -
- Hohlkörper
- 9 -
- Schale
- 10 -
- Rand
- 11 -
- Wandlerelemente
- 13 -
- Anschlussdraht
- 14 -
- Auslenkungsbegrenzer
- 15 -
- Durchführung
- 16 -
- Anschluss
- 17 -
- Metallschicht
- 18 -
- Stützbock
- 19 -
- Stützelement
- 20 -
- Verschraubung
- 21 -
- Ständer
- 22 -
- Sporn
- 23 -
- Plättchen
- 24 -
- Ständeroberteil
- 25 -
- Ständerunterteil
- 26 -
- Längenverstellung
- 27 -
- Schaltung
Claims (21)
- Implantierbarer elektromechanischer Wandler zum Empfangen von Schwingungen der Gehörknöchelchen und zur Umwandlung in eine elektrische Spannung, zum Einsatz als Mikrofon für ein Cochlea Implantat oder ein implantierbares Hörgerät, bestehend aus einem oder mehreren, von einem hermetisch dichten Hohlkörper (2) aus biokompatiblem Material umhausten, piezoelektrischen Wandlerelementen (11), dadurch gekennzeichnet, dass der Hohlkörper eine dünne Schale (9) aufweist, die an ihrer Innenseite mit den piezoelektrischen Wandlerelementen verbunden und an ihrer Außenseite an ein Gehörknöchelchen ankoppelbar ist und die von einem stabilen Rand (10) gehalten wird, wobei der stabile Rand an ein Gegenlager im Mittelohrraum ankoppelbar ist.
- Wandler nach Anspruch 1, dadurch gekennzeichnet, dass der stabile Rand (10) die Form eines elliptischen Hohlzylinders aufweist.
- Wandler nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Hohlkörper (8) ein Mittel zur Begrenzung der Auslenkung der dünnen Schale aufweist.
- Wandler nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das biokompatible Material des Hohlkörpers (8) Titan oder eine Titanlegierung ist.
- Wandler nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die dünne Schale (9) als Platte mit einer Dicke von 20 bis 50 µm ausgebildet ist.
- Wandler nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Verbindung zwischen der dünnen Schale (9) und dem stabilen Rand (10) geschweißt ist.
- Wandler nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass dünne Schale (9) und stabiler Rand (10) aus einem Ganzen bestehen und die Formgebung durch ein mechanisches Trenn- oder Umformverfahren oder durch ein Ätzverfahren erreicht wird.
- Wandler nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die piezoelektrischen Wandlerelemente (11) aus Piezokeramik, Piezofilm oder piezoelektrischen Einkristallen, vorzugsweise aus Bleizinkniobat-Bleititatnat (PZN-PT) oder Bleimagnesiumniobat-Bleititanat (PMN-PT), bestehen.
- Wandler nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die piezoelektrischen Wandlerelemente (11) mit der dünnen Schale (9) verklebt sind.
- Wandler nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die piezoelektrischen Wandlerelemente (11) in Kontakt zur dünnen Schale (9) mechanisch gelagert sind.
- Wandler nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die piezoelektrischen Wandlerelemente (11) als uni- oder multimorfe Biegeplatten oder - balken ausgeführt sind.
- Wandler nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass eine elektronische Schaltung (27), welche sich im Inneren des Hohlkörpers (8) befindet, zur Konditionierung der an den elektrischen Wandlerelementen (11) abgegriffenen elektrischen Spannung vorgesehen ist.
- Wandler nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass zum externen Abgriff der an den piezoelektrischen Wandlerelementen (11) anliegenden und gegebenenfalls elektronisch konditionierten elektrischen Spannung hermetisch dichte, elektrisch isolierende Durchführungen (15) durch den stabilen Rand (10) vorgesehen sind.
- Wandler nach Anspruch 13, dadurch gekennzeichnet, dass die hermetisch dichten, elektrisch isolierenden Durchführungen (15) aus Glas, Keramik oder Mineralien bestehen.
- Wandler nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die dünne Schale (9) an den mit dem langen Amboßfortsatz verbundenen Gelenkknorpel (7) des durchtrennten Amboß-Steigbügel-Gelenks (5) angekoppelt wird.
- Wandler nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass das Gegenlager von einem Ständer (21) aus biokompatiblem Material gebildet wird, welcher an einem Ende in der Nische des ovalen Fensters (6) abstützbar und am anderen Ende zur Aufnahme des stabilen Randes (10) ausgebildet ist.
- Wandler nach Anspruch 16, dadurch gekennzeichnet, dass der Ständer (21) ein Mittel zur Verankerung im knöchernen Kanal der Stapediussehne aufweist.
- Wandler nach Anspruch 16 oder 17, dadurch gekennzeichnet, dass der Ständer (21) ein Mittel zur Positionierung der dünnen Schale (9) relativ zum anzukoppelnden Gehörknöchelchen aufweist.
- Wandler nach Anspruch 18, dadurch gekennzeichnet, dass das Mittel zur Positionierung durch unterlegbare kleine Plättchen oder Keile aus biokompatiblem Material gebildet wird, welche zwischen Ständer (21) und stabilem Rand (10) eingebracht werden.
- Wandler nach Anspruch 18, dadurch gekennzeichnet, dass das Mittel zur Positionierung als Zweiteilung des Ständers (21) ausgebildet ist, wobei beide Teile rastbar miteinander verbunden sind.
- Wandler nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass das Gegenlager durch ein an einem Ende mit dem stabilen Rand (10) verbundenen und am anderen Ende mit einem Knochen verschraubbaren Stützelement (19) gebildet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10301723 | 2003-01-15 | ||
DE10301723A DE10301723B3 (de) | 2003-01-15 | 2003-01-15 | Implantierbarer elektromechanischer Wandler |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1439737A2 true EP1439737A2 (de) | 2004-07-21 |
EP1439737A3 EP1439737A3 (de) | 2009-10-14 |
EP1439737B1 EP1439737B1 (de) | 2013-03-13 |
Family
ID=32520018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP04450006A Expired - Lifetime EP1439737B1 (de) | 2003-01-15 | 2004-01-14 | Implantierbarer elektromechanischer Wandler |
Country Status (3)
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---|---|
US (1) | US7481761B2 (de) |
EP (1) | EP1439737B1 (de) |
DE (1) | DE10301723B3 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011066306A1 (en) * | 2009-11-24 | 2011-06-03 | Med-El Elektromedizinische Geraete Gmbh | Implantable microphone for hearing systems |
US8363862B2 (en) | 2008-07-11 | 2013-01-29 | Brain Basket, LLC | Magnetostrictive auditory system |
US9301066B2 (en) | 2011-10-06 | 2016-03-29 | Brain Basket, LLC | Auditory comprehension and audibility device |
US9794702B2 (en) | 2009-11-24 | 2017-10-17 | Med-El Elektromedizinische Geraete Gmbh | Implantable microphone for hearing systems |
CN114452035A (zh) * | 2022-04-08 | 2022-05-10 | 杭州师范大学附属医院(杭州市第二人民医院) | 软夹式人工镫骨假体 |
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US7876906B2 (en) | 2006-05-30 | 2011-01-25 | Sonitus Medical, Inc. | Methods and apparatus for processing audio signals |
TWI474723B (en) * | 2009-09-18 | 2015-02-21 | Voice receiver and the electronic device using the same | |
EP2484125B1 (de) | 2009-10-02 | 2015-03-11 | Sonitus Medical, Inc. | Intraorale vorrichtung zur klangübertragung über eine knochenleitung |
DE102009051057B4 (de) | 2009-10-28 | 2019-05-29 | Technische Universität Dresden | Implantierbarer Sensor-Aktor-Wandlerbaustein für die apparative Hörrehabilitation im Mittelohr |
DE102009051771A1 (de) | 2009-10-29 | 2011-05-05 | Moldenhauer, Martin, Dipl.-Ing. | Voll implantierbares optisches Mikrofon |
CA2806540A1 (en) * | 2010-08-03 | 2012-02-09 | Sonitus Medical, Inc. | Implantable piezoelectric polymer film microphone |
DE102011013895B4 (de) * | 2011-03-10 | 2020-08-27 | Technische Universität Dresden | Implantierbarer Sensor-Aktor-Wandlerbaustein für die apparative Hörrehabilitation nach DE 10 2009 051 057 B4 |
DK2786432T3 (en) | 2011-11-02 | 2016-03-14 | Kulah Haluk | An energy-absorbing cochlear implant |
WO2013163115A1 (en) | 2012-04-26 | 2013-10-31 | Med-El Elektromedizinische Geraete Gmbh | Non-pressure sensitive implantable microphone |
CN109788421B (zh) * | 2018-12-18 | 2020-08-21 | 中国矿业大学 | 一种初始压力可监控的圆窗激振式人工中耳作动器 |
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Publication number | Priority date | Publication date | Assignee | Title |
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US8363862B2 (en) | 2008-07-11 | 2013-01-29 | Brain Basket, LLC | Magnetostrictive auditory system |
US8923535B2 (en) | 2008-07-11 | 2014-12-30 | Brain Basket, LLC | Magnetostrictive auditory system |
US8721518B2 (en) | 2009-11-24 | 2014-05-13 | Med-El Elektromedizinische Geraete Gmbh | Implantable microphone for hearing systems |
CN102754456A (zh) * | 2009-11-24 | 2012-10-24 | Med-El电气医疗器械有限公司 | 用于助听系统的可植入麦克风 |
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CN102714777B (zh) * | 2009-11-24 | 2015-01-28 | Med-El电气医疗器械有限公司 | 用于听觉系统的可植入麦克风 |
CN102754456B (zh) * | 2009-11-24 | 2015-11-25 | Med-El电气医疗器械有限公司 | 用于助听系统的可植入麦克风 |
US9794702B2 (en) | 2009-11-24 | 2017-10-17 | Med-El Elektromedizinische Geraete Gmbh | Implantable microphone for hearing systems |
US9301066B2 (en) | 2011-10-06 | 2016-03-29 | Brain Basket, LLC | Auditory comprehension and audibility device |
CN114452035A (zh) * | 2022-04-08 | 2022-05-10 | 杭州师范大学附属医院(杭州市第二人民医院) | 软夹式人工镫骨假体 |
Also Published As
Publication number | Publication date |
---|---|
EP1439737B1 (de) | 2013-03-13 |
US7481761B2 (en) | 2009-01-27 |
DE10301723B3 (de) | 2004-09-16 |
EP1439737A3 (de) | 2009-10-14 |
US20050113633A1 (en) | 2005-05-26 |
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